LEGO 76421 Harry Potter Dobby the House-Elf Set £19.99 @ Amazon
My 6 year old son is Harry Potter obsessed and got this for Christmas this year, he sat and built it by himself and loved every minute of it.
This usually retails at £24.99 but is currently on sale for £19.99 @ Amazon. See the link above and don't forget to activate your FREE Prime membership, for FREE Delivery, if you don't already have it.
Dobby also comes with a buildable stand with nameplate, Aunt Petuinas floating puddle cake, a sock and book. He can also be moved into different poses.