What actually gets played with

The five, in order

1. The child sets the outcome. Open-endedness beats everything else combined. A toy that can be finished will be; a toy with no finish line is limited only by interest. See what open-ended means.
2. It is available. Not owned — available. A toy in a cupboard, in pieces across three rooms, or requiring an adult to set it up is functionally not there. This is why storage predicts use so strongly.
3. It connects to something else. Toys that combine with what the household already has get reinforced by every subsequent purchase. Standalone toys compete with everything instead.
4. The difficulty is right, and moves. Too easy is boring, too hard is abandoned. Toys that are used differently at different ages, or that carry graded challenges, stay in the right band for years.
5. Someone else is involved. Toys that produce interaction — games, walkie-talkies, anything played with a sibling or an adult — get pulled out far more often than solitary ones, which matches what the AAP emphasizes about play value.

What turns out not to matter

• Price. Several of the most-used toys we recommend cost under twenty dollars, and some of the most expensive things in the category are done in a month.
• Material. The wood-versus-plastic argument is mostly aesthetic. See wood against plastic.
• Educational claims. There is no relationship between the word on the box and the hours the toy gets used, and frequently an inverse one.
• Novelty. Actively negative. A toy that is interesting because it is new has spent its appeal within a fortnight.
• How well it demonstrates in a shop. Closed toys demonstrate brilliantly, because a demonstration is exactly what they are.

The one-question version

If you want a single test to run in a shop or on a listing: what does the child do on the tenth time? If the answer is “the same thing as the first time”, the toy is closed and its life is short. If the answer is “something different”, it is open, and it will still be there next year.

The household factors nobody counts

Two things outside the toy itself have an outsized effect. The first is how many toys are visible: with fewer out, each one gets used more. The second is whether an adult ever plays with it — a toy that has been played with jointly once gets picked up alone far more often afterwards. Neither costs anything, and both do more than upgrading a purchase would.

Why this page is on a site that sells toys

Because the conclusion is buy less and choose better, and that is a more useful thing to publish than another list. The commercial version of the same advice is on what is actually worth the money, which reaches the same place from the price side.