Teachers at a Leicestershire school are using a hi-tech method to make sure boys aim properly in the toilet block.
The Ibstock Junior School and Special Unit has launched its Bug Blasters campaign to encourage pupils to pay more attention to personal hygiene.
There are now special heat sensitive black stickers in the urinals which transform into smiley faces when boys aim at them.
Teacher Helen Town said the campaign had improved school hygiene standards.
She said: "You get young children in who aren't used to using the urinals and accidents do happen.
"But the stickers and the campaign are working and children are now washing their hands after going to the toilet a lot more often than they were before."