June Epic Cruise - Kids?

We are planning to take our two kids on the Epic in June (to the Mediterranean). Just found out that European schools don't get out until July. Can anyone tell me whether there will still be kids on this cruise? I don't know whether to switch to a July itinerary - we'd prefer to go in June, but not if my kids will have no one to play with in the kids club.

(Apologies for cross-posting - also posted this to a few FB groups).

You may not know but there may also be some cruisers with kids from your region.

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We went on the June 4th 2017 sailing of the Epic. There were quite a few kids on board of all age groups.