30 Creative & Fun Earth Day Activities For Kids To Celebrate Two or three cups of birdseed One cup of peanut butter How to make: Melt the peanut butter till the texture becomes runny but not too hot for little fingers. Cut the string into eight-inch strips and tie them to the pine cones. Dip the pine cones into the peanut butter. Now roll them in the birdseed for a thorough coating.