I saw that in the IKEA Tampines flyer.
Russian nesting dollsare the best known and most popular of all Russian souvenirs. The Russian word for these wooden dolls is "matryoshka", but they are also called matrioshka, matryoshkas, babushka dolls, babushka's doll, matroshka, matryushka, and stacking dolls
russian product, so look for russian shops
Those are Russian Dolls.
The Serendipity House
It's located in SG.