Rhombus

From BoardGameGeek:

The game of Rhombus begins with a large empty table space surrounded by two to four players, and each player holds a hand of three Rhombus cards. These cards are printed with geometric shapes in several colors, and the challenge is to play these cards to the table to form diamond shapes (rhombuses). Forming such shapes in different sizes and color combinations scores points, and it's possible to form multiple rhombuses with a single card placement. The colorful array of cards grows to cover the table until the last card is placed and final score tallied. Fast fun for all ages! -description from the publisher