It's dd's 4th birthday party in a couple of weeks and we're doing a little mermaid theme - up till now I haven't really bothered with party games other than pass the parcel as they have been too little but I reckon this year they'll be up for some serious games but have no idea where to start.. will be outdoors if weather is nice and will have a bouncy castle, also climbing frame and slide - I was thinking of somehow transforming the underneath bit of the climbing frame into a sort of underwater grotto type thing.