I don't have a "go to" kids panto, but here are the ones I have and like:
Security Blanket (by Dave Hudson), Kids Toys(by Deb Geisler--love it but not the easiest to execute well), Wascally Wabbit, Cupcake, Hugs & Kisses (by Judy Vallely), Monkey Business (by Patricia Ritter), Paper Dolls, Animal Crackers, Baby of Mine. I also love to do an allover "puzzle pieces" pattern on kids quilts, no pattern needed. Just use chalk to mark a grid the size you want and freehand it: upward line with a bump near the middle in either direction (l or r), horizontal line over the top of the square with a bump near the middle in either direction (up or down), downward line with a bump near the middle in either direction (l or r), horizontal line across the bottom of the next square with a bump near the middle in either direction (up or down), and repeat all across quilt. When you start the next row, do exactly the same thing and the open bottoms of the squares in the first row are automatically filled in. Hope my description makes sense. I guess if anything is my "go to" kids' pattern, puzzle pieces is it.