Toys & Joys plans are beautifully detailed and have been designed to be used as desk objects and shelf models. Plans include a material list, detailed drawings, complete assembly instructions and a photo. Wheels, axle pins and some miscellaneous turnings are available for this plan from Stockade. The Excavator uses 4 - #WT200 - Tread Wheels, 4 - #AP600 - Axle Pins, 36 - #WH079 - Contour Wheels, 3 - #AP375 - Axle Pins, 12 - #TP175 - Tiny Pegs, 1 - #JY38 - 3/8" Screwhole Buttons and 1 - #JY14 - 1/4" Screwhole Buttons. Please note that these parts are not included with this plan and must be ordered separately.