Build it tall, then pull it carefully
Sixty colour-coded wooden blocks stack into a tower up to 1 metre high, roughly a four-year-old's own height. Placing blocks up high means stretching and steadying. Pulling the bottom ones means crouching low. Both are big, whole-body movements, which is exactly what gross motor skills need at this age.
What each turn asks of them
A dice marked with the same colours as the blocks sets the challenge. Roll it, find a block of that colour, then slide it out without bringing the tower down. That slow, controlled pull builds hand-eye coordination, and remembering which blocks already felt loose gives memory a workout. Then comes the crash. Rebuilding straight away is how children learn to handle a wobbly loss and want another go.
Solo, group or just blocks
The set plays for 1 to 10 players, so it suits a backyard with two siblings as easily as a birthday party with a crowd. A single child can stack for height or test how far they can pull a block before the tower complains. Expect a good clatter when it falls, so it belongs outdoors or in a big room.
When the game is finished, the solid timber blocks become straightforward construction blocks for walls, bridges and towers of their own design. From turn-taking at 4 to quiet strategy about which block is safe to pull at 7 or 8, this grows with the players.
It is an outdoor game, but the timber is not waterproof. Store it indoors, keep it off wet grass and away from rain and dew, and wipe it clean with a damp cloth. Skip harsh chemical cleaners.