While most studies analyzing infant visual attention use methods varying from annotations of videos from head-mounted cameras [1], [2], [4], [5] to fixed screen-based eyetracking setups [6], [7], [8], [9], [10], increasing interest has been shown towards solutions that would pair the precision of eyetracking with the free mobility offered by video annotation. This would allow infant research to gather high-quality visual attention data in naturalistic situations, which might yield results more representative of real-world infant environments [11]. For this purpose, various forms of portable eye-tracking devices have been developed and used to study infant cognition [3], [12], [13], [14], along with frequently time-consuming infant-adapted calibration procedures. Recently, the advent of calibration-free lightweight wearable eye-tracking systems developed by Pupil Labs © is offering new and simpler ways to study infant visual attention with the advantages of deeplearning calibration and miniaturization. However, despite a wide variety of wearing accessories being offered by the company, no suitable option currently exists for infants younger than 2 years old. In this paper, instructions will be provided to build a new wearing accessory for Pupil Labs' Neon eyetracking module adapted to 3 to 24 months-old infants, along with usage instructions.