They may embody the spirit of fun.

They may even get a chuckle out of you.

But these art installations made from toys are anything but child's play.

In fact, they are the result of an artist's vision and backbreaking work. Four dinosaur installations, including a 2.3m-tall structure made from over 2,000 toys, will be on display from tomorrow at the National Museum of Singapore.

Created by 55-year-old Japanese artist Hiroshi Fuji over 31/2 months, the Toysaurse installation uses a total of 10,000 pre-loved toys collected from his toy exchange programme in Japan.

The installation explores the temporal nature of childhood and material possessions and reminds the audience to treasure what they have now.

Visitors can donate their old toys to the existing installation.

This is one of the six works exhibited at the Children's Season: Masak Masak 2016 that is happening from now to July 31.