I had bought extension kits for my boys' Gravitrax and Boomtrix sets for Christmas but have just generously given them to my mum to gift them as she wanted a couple of extra presents.
My DS's are 10 and 11 years old.
I'm looking for alternatives that will keep them busy on Christmas morning before we head over to my parents. They already have a ton of Lego so would prefer not another set; they really enjoy the Cubic Fun sets but love doing them with my mum and dad and although they enjoy games and puzzles there's a part of them that would really like a "toy" or set they can play with on Christmas morning (grown up marble run types have always ticked this box perfectly). Help, any new ideas I might not have thought of? Not looking for something huge or a major investment in Mario Lego.