Neville thought a minute. "It's my birthday in a few days," he ruminated. "Mum said we could have cake, at dinner." He thought a bit more. "I've a sort of idea, but I might need help with the spellwork," he admitted. "I'm not meant to do magic without supervision." Besides he doubted very much that Molly Weasley's feelings towards him would be much improved were he to burn down her kitchen.