Our favourite toys are cars, the wooden buggy DD got last Christmas essentially got it to appease the PIL ad their need to buy "girl" toys. But knew the kids would love pushing each other about in it then magnet toys, animals and play dough.... And they generally seem to play with whatever the other one wants to play with, of course, so it doesn't seem to end up too gendered. IYSWIM
But it changes regularly 
hales DS had a great day on Monday. We had loads of fun at the zoo. He walked a really long way! We had Currywurst and chips for lunch (basically a giant hotdog covered in ketchup) then we got the train back into town and had a quick coffee with a little treat. DS fell asleep while I carried him on my back and had about 10/15 minutes snooze until I woke him up on the train.
It was lovely. And the zoo was really empty! Which DS found a bit odd. But we went on the little boat ride and could see all the animals so i thought it was great.