I am another in the Komplete camp. For kids that age there are a lot of tutorials out there on how to get the hip sounds in Massive. Plus Reaktor both as a modular environment and lots of ensembles. Not to mention that Kontakt is an industry standard.
You might think something like Abbey Road 60s drums might not be useful to them, but considering how important samples of 60s drum loops have been in electronic music , that's a lesson already half written.