I built this for my daughter Summer, who is nearly six. She likes metal detecting, dinosaurs and making things, so that is most of what is in it.
There is no way to lose. Nothing chases her, nothing runs out and nothing is timed. She can put the tablet down halfway through anything and pick it up a week later exactly where she was.
Sweep the meadow and dig up ammonites, old coins, shark teeth and dinosaur bones. Take them home and lay them out on the shelves of her own museum, in whatever order she likes.
She carries the wood home first, then picks what to make next, then watches it go up piece by piece. Three trees and more than sixty things to build, from a rope ladder to a crow's nest.
Talk to them and they tell her something true. A frog drinks through its skin. An owl has one ear set higher than the other so it can work out where a sound came from.
She can ride her bike to a market, to Dino Land, to a pirate cove and to a cave with a grumpy T-rex in it. He is only grumpy because he keeps getting splinters.
If you are wondering about the usual things:
The app asks for no Android permissions at all, so it cannot send anything anywhere even if it wanted to. There is more detail in the privacy policy.