Heidi Klum is set to release a line of personalised T-shirts designed by her son.

The 39-year-old model has teamed up with Babies 'R' Us and will reveal the ''fun, monster themed'' T-shirts created by her six-year-old son Johan as part of the exclusive 'Truly Scrumptious by Heidi Klum' collection.

Speaking to WWD, Heidi said: ''Johan is super creative, and I knew I wanted to incorporate his whimsical and imaginative designs into my Truly Scrumptious collection in a very special way.''

The mother-of-four launched the T-shirts to help inspire creativity among children while raising awareness of Babies 'R' Us' charitable partner, Save the Children.

She said: ''I'm so proud as a mum and a designer to introduce this one-of-a-kind assortment of t-shirts to Babies 'R' Us customers in conjunction with my all-new summer apparel collection.''

The fashion icon first partnered up with Babies 'R' Us and Toys 'R' Us last April in a bid to create affordable, exclusive collections for children.

She said: ''As a mum of four, I'm constantly drawing design inspiration from my kids, whether it's their unique fashion sense, their latest art project or simply their zest for life.''

The T-shirts will be launched online at babiesrus.com/heidiklum on Thursday (04.04.13) and will be available at 'Babies 'R' Us' stores nationwide next week.