Where I am, nature can't seem to decide if it wants to be spring or winter. We're going from t-shirt weather to snowfall and back again. So the idea of a wagon that turns into a sleigh is extra appealing right now!
The Millside Industries Convertible Wagon/Sleigh is on sale at Amazon.ca for $119.99 (reg. $149.99) and it includes free shipping!
This wagon comes with both tires and sleigh runners which can be changed up in no time at all. It's Canadian-made and features an extra long handle for easy pulling. Most wagons are great for 3-seasons, but a 4-season one will surely come in extra handy.
This same wagon is also on sale at Chapters for the slightly lower price of $111.96, but you will need to pay extra for shipping.