First of all, you are an awesome grandpa! Last time I was using motors I used
the "Power Functions" system. There are a ton of youtube videos and some
amazing books. I'm a huge fan of Japanese LEGO designer Yoshihito Isogawa.
He has a bunch of books teaching you how to make different mechanical systems,
drive trains, gear set ups. Its amazing what you can do with LEGO.
I want to get my grandson stared on getting his lego creations motorised what
is the best set to buy ?
Any suggestions 👍
Well a good set would be 8293-1 it brings all power functions stuff to make things
motorized but it is a bit pricey. I think the best option is to buy each part
separated as it may be cheaper.