Glue crayons on a piece of white cardboard then take a blow dryer and melt the crayons. then draw a silhouette of what you want. I did this with my daughter a year ago...worked really well. I glued the crayons on first with craft glue....also have a drop sheet out as it can get abit messy!!!
Have two canvas's on newspaper. Put painters tape in random places and spots on the canvas and let the baby or anyone, do the painting with paint sponges! When it dries, take the tape off and have a look at your masterpiece!
Make your own stylish dress out of an oversized t shirt or any large shirt without a collar. If the shirt is too large under the arms you can always use no sew tape and make a casing to pull a ribbon through to tighten as you like. No sewing required.
Fun Oreo-on-a-Stick fun! Could be a fun DIY at a party too, have different chocolates/dips and toppings.