What to buy for a 4th birthday boy

[Tartany]

Any budget just need ideas asap as may have left it until last minute to purchase… have zero idea what four year old boys like! TIA

Lego

Cars, trucks, remote control car, Lego, art set, outdoor toys, playdoh, superhero figures, puzzles

Mine liked Thomas and Friends and Paw Patrol.

Kinetic sand.
A colouring book with a set of felt tip pens.
Lego (you can get sets that say age 4+).
Jenga. You can get big sets to play with outdoors, if he had a garden.