Plasticine Mega Pack £8.50 @ Tesco Direct
Plasticine is fun on its own, and also great for making accessories for other games and toys. Like rocks and plants for toy train sets, or to go with a Lego set.
It was a favourite of mine when I was a kid too. What I really liked about plasticine is that unlike Play Doh, it doesn't dry out. Also, it is harder so you can make proper models with it.
However, it can get mucky and won't necessarily last forever. Especially if it is used to help accessorise other games! Replenishing their plasticine stock is an excellent use of the good old Christmas stocking. And this is a huge pack, at a good price.
This Plasticine mega pack contains 20 different colours of placticine plus loads of cool accessories, allowing your offspring to make hundreds of cool models. Placticine will never dry out so you can use it over and over again. Plasticine is suitable for children in the age range of 3 years and upwards, although I think they get the best use out of it if they're 5 or older.
Thanks to mummybones at HUKD!