Gift idea 4 year old, help

[Birthdayidea]

NC as other posts are identifiable.
What would you get for a 4 year old boy? Into all things boy, cars, trucks, trains. Sometimes arty bits. Not sure what he has already so hoping for something a little different to avoid doubles. Budget about £50. What do your 4 year olds love?
Sorry I know I'm breaking the rules a little but posting here as more traffic. My posts in other places don't seem to get many replies. Thanks in advance.

My 4 y/o DS loves Gu Jit Zu toys so that would be my go to idea. Lego is another good option of that age.

Google it?

@Busephalus fab idea thanks. Wish I'd thought of that...

@PrudeyTwoShoes thank you. Haven't heard of those so will have a look. Appreciate the advice, I'm a bit clueless when buying for other people's children!

Air dry clay (the multi coloured polymer stuff) is always goes down well with crafty kids.

My kids love dressing up. Could you get some costumes (superheroes, Disney, power rangers, Ronald Dahl characters, dinosaurs etc.)? You can sometimes get a bundle on Facebook marketplace.

Playmobil? My 4yo has the fire engine, recycling truck and a couple of police sets and also loves his sister's playground and campervan sets.

Board games? UNO, junior monopoly, dobble.
Imaginext or playmobil.
Those clay type figures that they paint?