ARK's Guitar isn't your ordinary acoustic guitar - it's an "achewstic" guitar! This innovative oral motor chew features a long extension to reach the back molars, a smooth loop that's easy to hold, and bumps and ridges (on the stem) that resemble the strings/knobs of a real guitar while also providing sensory input. Use it: As an oral fidget for sensory seekers craving stimulation and proprioceptive input As a safe alternative to chewing on hands, knuckles, shirts, pencils, etc. As an alternative to tooth-grinding and/or thumb-sucking To help decrease oral defensiveness and food aversions To practice biting/chewing without the risk of choking To work on jaw strength and stability and oral motor skills To build oral strength, mobility, and control To satisfy the urge to chew for individuals who are fed through a g-tube ARK Guitar chew comes in 3 colour-coded toughness levels: Standard (red or dark blue) - These are the softest ones with the most “squishiness” and “give” to them. Recommended for mild chewers and/or beginners practicing biting/chewing skills Medium Firm / XT (lime green or teal) - XT stands for "Xtra Tough," recommended for moderate chewing. These are firmer, but still chewy. Very Firm / XXT (royal blue, orange or forest green) - XXT stands for "Xtra Xtra Tough," recommended for more avid chewing. These are the most firm and provide the most resistance to the jaw. No chew tool is indestructible, but these are very tough. ARK manufactures its chews in the USA. It's medical grade, FDA compliant, and contains NO lead, phthalates, PVC, BPA, or latex. Measures approximately 12.5cm lengthwise, just under 5cm across the loop, and 1cm thick. Caution: although these chew tools are sturdy and durable, no chew tool is indestructible. Some individuals (particularly those with heavy oral needs and aggressive biting/chewing) may be able to damage the tools. How long each tool lasts depends on the oral sensory needs of the child, whether or not they are seeing an occupational therapist if needed, as well as many other variables in his/her life. Please supervise at all times and replace if necessary when the item shows signs of wear and tear.