Caveman comedy short film ideas

I volunteer with a youth group and am running a filmmaking project. To encourage the children to get involved I'm making a short (1-2 minute), not for profit film about a caveman. This will involve one man shot against green screen, with no dialogue. I'm not much of a writer so I need funny, child friendly ideas showing: 1). The invention of the wheel, ideally discovered accidentally. 2). The discovery of fire, again a funny accident. 3). A funny scenario involving a dinosaur - how does the caveman escape? All three ideas can be combined e.g. somehow he accidentally discovers fire and invents the wheel because he is being chased by a dinosaur, and this is how he escapes. I need you to submit actual story ideas and I will pick and pay for the funniest, most original ones. The fee for each idea is £10 and I may award up to three freelancers and combine their ideas. As well as this each freelancer will be credited within the film. The film will be uploaded to sites like YouTube and you will receive a link. You will not be able to upload it anywhere yourselves. Obviously there is a trust issue here (once you submit your story idea, how do you know I won't just use it?) and I'm not sure how best to offer you protection. If there is a better way to do this please let me know. "As an author you automatically have copyright over your script, unless you assign it to someone else. You do not have to go through any formal procedure – if you wrote it, and you have not infringed someone else’s copyright, then the copyright is yours." - [login to view URL] I am aware of copyright issues and if I infringe your copyright I fully expect you to take legal action against me. I look forwad to receiving your ideas, Richard.