Some wood model planes use balsa wood, which is a thin wood that is lightweight enough to glide, but also pliable enough to use for constructing the plane. Wooden model planes can also be constructed of other woods, but balsa is the most popular. You can either purchase sheets of wood and design your own plane or you can purchase wood model plane kits. Some kits will come with everything you need, while others will not. Be sure to check the packaging to see what you are getting.
One of the most important materials to have for your wood model plane is a good hobby knife. These can be purchased online or at local craft or hobby stores for a small cost. This is especially important if you will be designing your own wood model plane or if your kit does not come with pre-cut shapes. Also equally important is a good bonding glue. C/A glue and white glue both work well for balsa wood, as well as many other woods. Keep a ruler around for measuring and also for drawing patterns.
It's also good to have a pencil for drawing any pattern lines. A regular #2 pencil is fine. Wax paper is great to put underneath the working area so that the wooden model does not stick to the work surface. If you use plain newspapers, like with other crafts, the balsa wood may accidentally get glued down to the newspaper. With wax paper, this problem can be prevented a little better.
Also keep some fine grit sandpaper handy for your wood model plane. Sandpaper may be needed to smooth any rough edges. Be careful if you're using balsa wood. This type of wood is very thin as it is, so you don't want to overdo it on sanding. One or two sweeps is generally enough. If you would like your plane to be radio-controlled, you will also need to purchase the supplies for that, including an engine. Also there is paint, decals, and other decoration and model plane accessory materials to consider.