Ideas for 3 year old birthday present?

[Strawberry1934]

My little boy I 3 in less than a month and I'm really struggling to find something for his birthday! He understands it a bit more this year so I would like to get some something nice, especially as he's not long become a big brother so I'd really like to make it special for him and make it about him. He's been amazing since his little sibling arrived

I'm not one to spend 100s of pound , as he gets little gifts through the year and he doesn't go without ,

He loves cars and dinosaurs , but he's got 100s of cars and dinosaur toys and books so I don't want to just buy more of these things!

AquaPlay lock box
Duplo
Sand pit
Toy work bench (the Theo Klein and Smoby Black and Decker ones are the best)
Motorised train set (e.g Thomas and Friends)
Ride on tractor and trailer or JCB digger

Balance bike
Stomp rocket
Face paint kit
Big bouncy ball
Jigsaw puzzle
Playmobil kit
Teddy
Harmonica

DD1 just turned three and was given an Orchard Toys Big Road puzzle, which is pieces that fit together all sorts of ways to make roads for cars to drive on. She also got a pop-up dinosaur tent by Imaginate. Both of those fit his interests, but are perhaps a bit different (and I can't claim credit for either idea, neither gift was from us!). She also has a Melissa and Doug reusable sticker book that has dinosaurs (and other animals) that we've had for ages and has had a huge amount of use. They're great on windows/patio doors as well as the scenes in the book.

Her big present was a set of the magnetic building tiles, which have been very popular, but a bit more expensive.

We've just bought our 3 year old a Yoto player - a bit pricey but we hope it will last a long time. She really likes music, so we're hoping she will enjoy choosing and playing her own cards rather than asking for us to put on CDs for her.

Other than that, relatives are buying Orchard Toy puzzles, a play shopping till, books and kinetic sand.

DS just turned three and gifts that went down very well: a RC monster truck, a playmobil forklift, a hape crane, some Spider-Man figurines, a toy blender.

DS had a train set as his main present when he turned 3 (he loves it, which is a bit of a bugger as it means it’s permanently set up in his room).
The other present he absolutely loved, and still plays with everyday, was an indoor trampoline.