Ribbet Ribbet Croak

The kids are cheerfully ribbeting, waving paper fish or clapping along. Behind them, adults sit with expressions that vary from stoic constipation, to phone-scanning boredom, to dementedly intense focus on the back of their child's head. This is definitely a kids' kids show, with production values at about the level of a primary school assembly, and about as many concessions to the adult half of the audience.

Natalie Kapur and Natalie Green perform as Grandma and Grandpa Frog, wearing flapping flippers, and making a sloshy array of slippery mouth sounds. There's a vague, directionless plot, but it's really an excuse to get out prop after flimsy prop, cobbled together from cardboard and tissue paper. They visit the sea, the moon, a generic hot country and, eventually, return to their house in the woods to throw a frog party.

There's enough going on the hold the kids' attention – but nothing more. Moulded Theatre's unambitous approach never steps out of the most cliched language of under-fives storytelling, or risks a moment of danger, or excitement.

The gentle music and multi-sensory approach make it a safe environment for babies and nervous children. But that's not enough. Kids' imaginations aren't allowed to leap, while adults are left dangling their feet in a tepid paddling pool – these frogs are treading water.