Don’t be afraid of the money. At this stage they just need to be able to add (up to 10) and recognise one digit coins. Join this goal with practicing number bonds to 10. Please also check "Giving change from 10p" goal.
I like to initiate maths activity with a good picture book. There is a lot of them on amarket and you might already have one, if you don't I love this one "Supermarket Zoo". read it with your child first and create a shop. Make price tags and use real coins to pay. Have fun!