What is your pre schooler first hobby?

Crime. My nephew's first hobby was taking things and hoarding it somewhere in the house like a racoon. We were all wondering where our keys were and all that. Then check check it was all in a pile under the small table lol. So turns out he likes collecting things so we started giving him stamps to collect(coz if we give those trading card games later scared he will steal from other people. Also stamps lol no one to steal from hahaha) Then we go to the post office weekly or we look online to find stamps to buy as an activity together. It's interesting ah. Coz now he's like oh this is England stamp, this is singapore stamp and etc. Like geography. Btw any of you all have cousins or relatives studying geography for degree? my younger cousin thinking of doing it but need a bit of advice.