Another member here (sorry, don't remember who or which thread) made several unisex gift boxes with back-to-school supplies. Right now, the prices are right!
When the sales start, she stocks up on school boxes, crayons, scissors, erasers, watercolors, markers, etc., then stores them for the birthday. When the birthday rolls around, she adds a gender-specific coloring book and has a nice gift for about $3.
I started this a few weeks ago. This week Target has washable Crayola markers for $1 a box, which is the last thing I need for my gift packs.