PCSO Alison Evans is appealing for information about damage to the play park in Coningsby.
Some time between Thursday March 27 and Wednesday April 1, green and black marker pens were used to write obscene graffiti on the wooden play equipment and bench.
PCSO Evans said: “The play park has only recently been refurbished at considerable expense so this mindless vandalism has caused great upset to the parents and children who use the park, and also the local council.
“The graffiti is very vulgar and offensive and the culprits have obviously given no thought to the fact that very young children will see it”.
PCSO Evans is urging anyone with information to contact her at Coninsgby Police Station by dropping by in person or calling 101.