All models are plastic and are hinged at the basin, except pluto, which is very convenient: they can thus be standing or sitting. The arms do not move. They are about 7 cm and are not "tiny". For now they seem strong but it remains to be seen over time. Two minor drawbacks to this set: - Daisy lacks ... what a shame not to find her in this package, especially given the price .... - The price is quite expensive for 5 figures! My little boy of two and a half years is a lot of fun with all the characters and leaves them no more.