Yard game safety and age floors

That table is mostly empty, and we are not going to fill it in. An age floor invented by a publisher is indistinguishable on the page from one set by the manufacturer who tested the product, and the second one is worth something.

1. Mass, thrown

This is the one that matters most and it varies enormously. The NHPA sets the horseshoe limit at no more than 2 pounds 10 ounces of drop-forged steel, pitched overhand across 27 to 37 feet into a pit. A full-size bocce ball publishes 2 pounds, but it is rolled underarm along the ground. A cornhole bag is 16 ounces of fabric, thrown in an arc. A Spikeball is inflated and weighs almost nothing.

Those are four completely different risk profiles, and only the first one should change who is allowed in the yard while it is being played.

2. Height, falling

A giant stacking tower starts at 2.5 feet and reaches over five in play. When it goes, 56 pine blocks come down and scatter — which is why the published footprint is about 10 by 10 feet of clear space rather than the size of the tower. That figure is a fall radius. Treat it as one.

3. The ground

Underrated, and the cause of most of the minor injuries. Spikeball involves diving as normal play, and roundnet is published for grass, sand and hard surfaces — the equipment is fine on concrete and the players are not. Uneven ground and long grass hide the holes that turn ankles.

Where nothing is published, three visible properties get you most of the way:

1. What is the heaviest single object, and is it thrown? Anything above a pound thrown at distance deserves adult supervision. Anything metal is a different category entirely.
2. How far does it travel? A game with a published 15-foot toss distance is easier to supervise than one with goals 50 feet apart, simply because you can see the whole thing.
3. Can a child reach the part of the game that matters? This is the subtle one and it is not a safety question so much as a fairness one. A stacking tower's endgame happens at four or five feet. A child who cannot reach it is not playing, however low the published age floor is.

That last point is why the 21-inch junior tower exists and why it carries the same 8+ rating as its bigger siblings — it changes reach, not risk. Comparison of all the sizes: giant Jenga sets.

• Horseshoes. Steel, up to 2 pounds 10 ounces, pitched across 27 to 37 feet. There is no version of this that belongs at a party with children.
• The full-size hardwood stacking tower. Jenga GIANT publishes 12+, and a hardwood block falling from over five feet is the reason.
• Spikeball, if the surface is hard. The game is fine; concrete is not.

What to run instead is in yard games for a kids' birthday party and yard games for kids. For weather-related failure modes rather than injury ones, see giant games in wind and weather.