Blue track!
Use magnatiles and blocks to build tunnels for the track, garages, etc.
My 5yr old and 7yr old get a lot of entertainment out if this - but it’s loud.
Hot Wheels Massive Loop Mayhem Track Set with Huge 28-Inch Tall Track Loop Slam Launcher, Battery Box & 1 Hot Wheels 1:64 Scale Car, Designed for Multi-Car Play, Gift for Kids 5 Years Old & Up
https://a.co/d/8LH9hGl
My younger child at 4/young5 would get really frustrated with any set where you had to get the angle and jump just right for the car to land in the right spot to feed into a loop.
Hot wheels are the same gauge as wooden train tracks - you can build driving courses out of train tracks.