I do more art than crafts. I do however do crafts for holidays and sometimes when we do our letter of the week. The other stuff is just me bringing out supplies and they do what they want.

I don't think it really matters how many times a week you do it as long as it's something every now and then. It teaches and exposes them to great, fun,new things! I do it because I'm used to centres (had to do it every day) and it really occupies them and helps fill the day.

Glitter however is banned!!! lol