The kids and I have been making crafts since oldest was a tot. We have also made more messes than you could begin to count! The Ultra Pro Craft Mat is phenomenal for crafting, with or without kiddos. 
     I am pretty accident prone, so the Ultra Pro Craft Mat's large surface gives me enough room to be comfortable working at my dining room table and not having a panic attack. It is 23-3/4 x 13-1/2 and has a rubber backing to prevent it from slipping while I am working.