I bought a small Battery operated Christmas tree in Aldi for £5 . For my daughter's bedroom. Only a table decoration really, but changing lights, and complete with batteries. Saw the same thing in a garden centre for £20. It's been going for a month on the same batteries (my daughter was celebrating Chrismas in Novemebr) . Got it. In front of us now, and it's lighting up the room. Bargain.
I've got a huge flag fastened to my house roof, it looks lovely with twinkly lights around it, it only cost me a trip into the north stand :-D