Triskarino is a holonomic robot basis, presently implemented in 5 instances. It mounts three omniwheels and a control system based on Arduino (Uno, Mega, or Due). It can run at up to 1 m/sec. It can be configured in different ways. One is Theatrebot, a robot able to show emotions without using a bio-inspired body, used to play on stage with human actors. Other two implement Teo, a robot designed to interact with children with different diabilities, which can be used also with a multimedial system, and which has been developed within the project KROG, funded by Politecnico di Milano under the Polisocial program. The last two instances of Triskarino are used to build emotional, social objects and to implement robogames.