If you're looking for a play tent for the garden then you can't really go wrong with one of these. B&M have a Ladybird or Butterfly Play Tent and Tunnel for just £9.99, and they are just as wonderful as they look.
My kids have the Ladybird one at their grandparents house to play in, and they are much bigger than they look, and are really sturdy. You get into the tent via the 'secret' tunnel behind the Ladybird's or Butterfly's face, though this can also be separated from the tent if you want a bigger opening. The top has a mesh part at the top to let light in and for ventilation, which is needed of you have the tunnel closed.
The whole thing can fold down flat and be stored inside it's own carry bag so it takes up hardly any space and is really easy to transport if you want to take it anywhere.
Unfortunately B&M don't yet offer online shopping so these are only available in store, but as they are new in there should be plenty of stock about. B&M advise contacting your local store to check availability and you can find the contact details on the Store Finder here.
In previous years they sold a Frog as well as the Ladybird and I'm hoping they bring that back as well, though the Butterfly is brand new this season.