why doesnt he want to go? that would be what i would be thinking about.
but if he is just being a pita, as my own ds4 does on the school/pre-school run then i just insist, i offer a 'reward' ie if he scoots/walks nicely then he will get a small treat, watching thundercats is his current choice! or alittle milkyway etc.
we have a half hour walk to school and pre-school but i have 13mth old dd and i go over a field so like you cannot use the buggyboard, in the end i just took it off and we do still get moaning but i try and make it fun, ie race me to the next tree/lampost etc, point out things for him to look at, cheer him on he is a big fan of lighting mcqueen so making referencs to that helps, or the film about a superhero dog bolt? she says 'zoom zoom' so i say that to ds4, i probably sound like a twat to any passers by, but it all helps!
there have been times when i have just had to hold his hand and make him walk and he has whinged the whole way, of course when he gets there he then runs around the playground like a loon! so i KNOW he is not tired he is trying it on.
you need to work out if there is a reason for not wanitng to go to pre-school or if he is just trying it on.
then try making it fun, offering a reward etc. you know he can do it, so unless he has been ill recently and is tired? or have a reason for being upset re pre-school then you are going to have to stick to your guns! good luck :)
oh i recently bought ds4 a 'hooter' to go on his scooter which has made him more enthusiastic to scoot! it was only a couple of quid :)