20 also comprises a t shaped hook 28 or 28 a pivotally attached to a top portion of the back wall 13 for engaging a head rest 41 on a front seat 40 as shown in fig1 a to secure the case device 21 to the front seat 40 a means such as mating hook and loop fasteners 50 a and 50 b or mating connectors 70 and 71 is provided for adjusting the t shaped hook 28 or 28 a to fit various vehicle front seat 40 heights while maintaining the table 24 height at an ergonomically efficient height for use by a child in a back seat in fig6 a and 6b the t shaped hook 28 comprises an attaching segment 7 that attaches to the back wall 13 and a hook segment 8 overlapping the attaching segment 7 the hook segment 8 is attachable to the attaching segment 7 by mating hook and loop fasteners 50 a and 50 b the mating hook and loop fasteners 50 a and 50 b provide a means for attaching various components 7 and 8 of the device 20 together and also the means of adjusting the t shaped hook 28 to fit various vehicle front seat 40 heights in fig6 c and 6d the t shaped hook 28 a comprises a single element having a t shaped hook end 8 to hook through a pair of upright supports 42 of a headrest 41 on the front seat 40 and an attaching end 7 the means for adjusting the t shaped hook 28 a to fit various vehicle front seat.