Kid's Teepee Play Tent £4.99 (was £14.99) @ Mountain Warehouse
This Kid's Teepee Tent is a huge 67% off, taking the price down from £14.99 to just £4.99 and you can buy in Mountain Warehouse stores or order it online.
It's easy to assemble, lightweight, and can be used both indoors or outside. It's made of polyester, and it has a roll-up window, and a roll-back door.
Delivery is free on orders over £50, or costs just £2.50 on smaller orders, so if you just order the teepee it will be £7.49 including delivery which I think is really good value for a kid's play tent.