Simple ramp walking animals can be very easy to make, requiring only cardboard and scissors and perhaps a little glue. While much easier than ones made from wood, they are also less durable and may be a bit more temperamental requiring adjustments are cardboard integrity changes. Ramp walking toys have actually been around for quite a while, the first ones were metal elephants produced back in the 1800's. In the 1930 and 40's the popular material was plastic made that was made into Disney and other popular characters. Recently there has been a surge in wooden ramp walking toys. The wooden toys are very durable but requires wood working tools for making them.