I asked my daughter who works in this space Carmen Vitnell – info@sourceforme.com.au and she recommends:
I would recommend doing less options, and investing a little more into each option – eg. Make it a nicer product.
Things that can be used regularly and are functional are popular – metal vacuum drink bottles, lunch bags, lunchboxes, cutlery sets, picnic mats, hats.
Otherwise something ‘on trend’ – eg. Fidget spinners/poppers
Eco-friendly is the other ’trend’ – so anything made of recycled products, BPA free etc.
Hope that helps (she has previously supplied several other schools)
Sue Ellson