What about asking the teacher if he could bring in a small selection of 'different' fruits and do a quick tasting session.... things they don't get in class.... I know my kids who are in Reception and Year 2 did a fruit salad.... preparing, chopping then of course eating it and they loved doing that.... suggestions could be:
Pineapple
Grapes
Melon
Kiwi
Strawberries
Mango
Small amount of each would be enough for the kids to all have a taste and they could perhaps talk about where the different fruits come from...
Just a thought - hope it helps.....
MMmmmm did someone mention yoghurt coated raisins.... yummy..... if your son decides to go with that option then I'd go and get a couple of big bags from the health food shop as the individual bags at Tesco etc are 35p each only a handful too!!
How thoughtful is your son KD - you have done a great job there.....