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 and axle pins are available for this plan from Stockade. The Pup Trailer uses 6 - WT275 - Tread Wheels, 6 - #AP600 - Axle Pins, 6 - #AP375 - Axle Pins, 1 - #TP175 - Axle Pin and 1 - #JY14 - 1/4" Screwhole Buttons. Please note, these items are not included with the plan and must be ordered separately.