nice
you can get a huge not heavy ball and play "ball burns".. the child-children stand on one side of the room and run twards you while you throw the ball and try to hit then.. but you need big empty space. Great fun - kid love it
or play :chopper, aeroplane, rocket - hands imitate the vehicles and you run around faster and faster and then... bummm. the rocket hits ground
try also "dancing" for little kids: boogie beebies
http://www.bbc.co.uk/cbeebies/boogie-beebies/songs/
really recomend the "dances"
there is also an old game - one person is the sleeping bear and is sitting on the ground, others go around in close circle signing: the old bear is sleeping, the old bear is sleeping, we are so afraid, we are so quiet, when he wakes he'll eat us,,, then the bear slowly moves according to song: the old bear is sleeping, the old bear is snorring, the old bear is...!cathing! and then start to catch one and... well... giggless and so on
also you can get him a small trampoline and a gym mat and do all sorts of excersises using upper muscles
I used to send Asia to a gym class for little tikes - kids from 3 to 5 - just gym,music, running around and so on... she never got sick from that but once, there where kids around - so fun.fun..fun...
it was in judo club also with fun judo for kids from 5 up - twice a week. maybe you can get him in a class like that. Asia started the gym when was 2,5 for over a year and now she is almost 5 and was in balet dancing class since almost 4 with kids older - 6 - - it's possible if you stay durring the class - outside - but at hand - and the group is rather small..and also ...big atraction - other kids
she also went to swimming classes once a week - but this year was the last for her since she is going to grade 0 to school in a months time - so we'll stick to balet onlly I guess and other home attractions and bike ans so on. But we'll see what she chooses.