Kiddicare was established in 1974 and has grown to become the UK's largest privately owned supplier of nursery products.
The business has recently opened a giant nursery superstore which stretches over 160,000 square feet of space.
Threepipe will raise the profile of the management team within national business press. The agency is also charged with helping to drive footfall into the Peterborough store and run social media campaigns to engage mums to visit kiddicare.com.
The appointment follows another win for the agency with BG Nappies to provide PR support for its BumGenius range of nappies and accessories.
Threepipe's junior division will aim to raise brand and product awareness among new and expectant mums through parenting, lifestyle and social media campaigns.