Kids Table at Reception - invitation wording

I've never heard of them but they look fantastic!

This is such a fun idea, and I think the wording you've got there is great. Maybe consider hiring someone like a nanny to keep an eye on them too? It could keep things even more tame and also ensure no little ones are escaping onto the dance floor with their lego or running around with cap-less markers

I get why you want that information and if there is room on the invite to say all that I think it works great!

If not, maybe just change it to: Age(s)? Activity: [ ] Colouring* [ ] Lego [ ] Playdough

*Make sure to double check your spelling so you are using the proper way (colour - not color).

Kids Tables aren't usually put on the invitation.
As your guests will be entering the Reception, you can have Kids Table put on the chart or the names of the kids with Kids Table on the card. This way it will make it easy for them to know and see the variety of trying to choose what activity they want to pick. Assortment of all three activites can be per table allowing every child enjoying all of them.

I do say this as its been done at some of my cousins wedding and a nanny was hired to keep them busy while the adults enjoyed their evening.