Series of exercises of categorization, identification and discrimination of objects, shapes and colors. Over fifty exercises are presented in a playful way and with increasing difficulty; their structure and sequence was specifically designed and thoroughly tested for use by children with autism spectrum disorders. Special attention has been paid to determining the sequence of "game levels", from the choice of the elements presented to the pre-set objectives, to obtain a progressive involvement that leads to the transparency of the formal playful content, focusing attention on the objects and their interactions . Even the background music (which can be deactivated) that accompanies each exercise has been chosen to encourage attention and recognition of the sequence of levels in subsequent sessions of use. During the tests that accompanied the development and fine-tuning of the app, it was noted that most of the children involved were very satisfied, repeatedly asking to use the app, often in long sessions. Even the most complex "levels" can be overcome autonomously thanks to the small aids available at all times.