Babys first Christmas?

What would you buy a 3 month old for christmas?

Hes getting a highchair and a bouncer/play mat. And the foam abc floor mat. I know that for a fact but im lost on what to get him everyone says dont go all out he isn't gonna know or be able to open them.. its just his first Xmas so i wanna get him stuff but im lost

Throw me some ideas ladies plz :)