Gadget to hold the loo seat shut

[BlackberryWilde]

Hi
I hope you can help. My cousins son has developed an obsession with the loo seat. He's only a year old so doesn't quite understand no thats naughty/dirty etc but as all of her doors are push doors he can get into the bathroom very easily so she can't simply close the door.
I know there are loads of gadgets for blocking video players, holding cupboard doors shut but I haven't seen anything for loo seats and wondered if anyone has any products recommendations or suggestions for stopping him doing it.
Your help is much appreciated.
Thanks
BW

Something like this ?

I bought one, I think from Mothercare about 7 years ago, but my very determined son pulled it off. In the end I kept disinfecting toilet cleaning wipes by the loo and kept it as possible.

Cheaper one .

Great, thank you. I'm seeing my cousin tomorrow so will ask her which one she wants me to order for her (she doesn't have internet access).
Chocolateface - thanks for the feedback, she wants to give one a go, in case it works long enough for him to understand its not something he is supposed to do.
Thanks again.
BW