Alex Pring dressed up as Tony Stark to present a young boy with a bionic Iron man arm . Robert Downey Jr. , a 7-year-old who was born with a partially developed right arm , received the 3-D arm . The arm was created thanks to Microsoft One Note 's Collective Project and Limbitless Solutions , a group that develops affordable 3D-printed limbs .
Robert Downey Jr. dressed up as Tony Stark to present a young boy with a bionic Iron man arm . Alex Pring , a 7-year-old who was born with a partially developed right arm , received the 3-D arm . The arm was created thanks to Microsoft One Note 's Collective Project and Limbitless Solutions , a group that develops affordable 3D-printed limbs .