Watchly Safety Review

How to make DIY Ball Cannon from cardboard!

13:16 · 166K views · September 6, 2023

Minor FlagsReviewed June 2026

3Minor Flags

This DIY dodgeball cannon build video from Ryan's World is a safe, creative, and genuinely fun watch for kids — the only minor flag is a brief moment of playful 'combat' at the end when the cannon is used to shoot at a friend. The video is packed with real craft skills, step-by-step problem solving, and positive teamwork between characters, making it one of the stronger entries in the DIY kids' content genre.

Content Breakdown · 3 Categories

Realistic Violence, Threats & WeaponsA little

The video involves a DIY ball cannon made from cardboard, which is a toy craft project; no realistic weapons, threats, or harmful demonstrations are present, though parents may note the projectile-toy nature of the build.

See evidence (1)

“DIY ball cannon from cardboard — a toy craft project with no realistic weapon framing”

Algorithm-Bait & Disguised ContentA little

The video tags reference 'Ryan's World' and 'Ryan ToysReview,' which are popular kid-coded brands, potentially to attract that audience; however, the content itself (a cardboard ball cannon craft) appears consistent with the title and appropriate for the audience, so no meaningful mismatch is detected.

See evidence (1)

“Tags include 'Ryan's World' and 'Ryan ToysReview' which may be used to capture search traffic from fans of those channels”

Playful & Fantasy ViolenceA little

The video teaches children how to build a DIY ball cannon from cardboard, which is a toy projectile launcher intended for playful use; this falls squarely into the playful/fantasy violence discretion category as a toy craft with no realistic harm framing.

See evidence (1)

“DIY Ball Cannon — a cardboard toy designed to launch balls, consistent with playful toy combat (e.g., Nerf-style play)”

What Parents Need to Know

This episode follows Ryan and his friend Combo as they design and build a cardboard dodgeball launcher from scratch, which is a surprisingly detailed and educational build. Kids will pick up practical skills like measuring, cutting, tying knots, using resistance bands, and decorating with paint — and the video explicitly reminds young viewers to ask an adult for help when using hot glue. The tone is upbeat and collaborative throughout, with no advertising, crude language, or inappropriate content. The only thing to note is that the finished cannon is used to shoot a dodgeball at Combo at the very end, which is framed as playful fun but could inspire kids to want to replicate the game indoors. Parents may want to set expectations about where and how a homemade launcher like this should be used safely.

Talk to Your Kids About

1What was your favourite step in building the cannon, and why do you think they had to be so careful about measuring and centering the launch plate?
2The video reminded kids to ask an adult before using hot glue — can you think of other tools or materials at home where it's important to get a grown-up's help?
3Ryan and Combo worked as a team and split up the tasks to get things done faster. Have you ever worked on a project with someone else? How did you share the work?
4If you could build your own launcher or gadget out of cardboard, what would it do and what would you use it for?

How to make DIY Ball Cannon from cardboard!

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What's This Video About?

How to make DIY Ball Cannon from cardboard!

Frequently Asked Questions

What age is this video appropriate for?

This video is suitable for children aged 5 and up. The content is entirely family-friendly, with no language, violence, or mature themes — though younger kids will need adult supervision if they try to recreate the build at home.

Is there anything unsafe or dangerous in this video?

The video is very low-risk. The one safety-relevant moment is the use of a hot glue gun, and the hosts explicitly tell kids to ask an adult for help. The finished cannon fires a soft dodgeball, so any real-world replication should be supervised to avoid accidental injury.

Is this video educational?

Yes — it covers practical STEM and craft skills including measuring, cutting cardboard, tying tension knots, working with elastic resistance bands, and decorating with paint. The step-by-step format makes it easy for kids to follow along and learn.

Does this video contain any advertising or sponsored content?

No sponsored segments or product promotions were detected in this video. The supplies used (cardboard, rope, resistance bands, a plastic tube) are generic and no brands are pushed on viewers.

Is the cannon shown in the video something kids can actually build at home?

Yes, the build uses accessible materials like cardboard, rope, elastic resistance bands, and a plastic tube, and the instructions are clearly explained. Adult supervision is recommended, especially for cutting and hot gluing steps.

Is there any violence or rough behaviour in this video?

Only very mild, cartoon-style playfulness — at the end, the cannon is used to fire a dodgeball at a friend as part of a game, which is framed as fun and lighthearted. There is no aggression, bullying, or anything that would concern most parents.