The first course of action though is to get your son used to
using the potty or toilet sitting down first. I am not sure how far you are
on with potty training but if your son happily sits down to wee you could try
and introduce the standing method, especially if he is showing interest.
Dads too can help here; you can all make the process of weeing
standing up a game. Often little boys like the noise the wee makes on the side
of the potty and this is reinforcement enough for them!
To encourage your child to stand up whilst passing urine and
have the correct aim, some Mums and Dads put toilet paper rolled up into balls
in the toilet bowl and get their sons to aim their stream, to sink them. All
good fun! Remember to praise his success.