Exercise programs were proved to be very important for disabled population as it helps in compensating some abilities that were naturally lost due to the nature of the disability. This is why researchers in the field of disability and sports always care about developing programs to increase the ability of movement and mobility for disabled people in addition to enhancing their psychological state, especially children as the importance of these programs in childhood is more than its importance for adults. The researcher aims for developing some physical and psychological variables for Lower limb disabled children from 9 to 12 years old (n=20) through an exercise program "free and with tools". The physical variables were chosen and determined through a questionnaire that was distributed among academic experts and Paralympics coaches. The researchers used the experimental method on one group using pre, intra and post measurements to measure muscular strength (Maximum static strength – Power), Maximum arms speed and muscular power for arms. In addition to measuring the rate of physical self esteem as one of the most important psychological characteristics for disabled populations through a newly designed questionnaire that was proved reliable for measuring this variable. The results showed the presence of significant differences between pre, intra and post measurements in the values of strength, power and speed in favor of the intra measurement against the pre measurement and in favor of the post measurement against the pre and intra measurements. Also, the presence of significant differences between pre, intra and post measurements in favor of the intra measurement against the pre measurement and in favor of the post measurement against the pre and intra measurements in the values of self esteem, which proves that the recommended program had a positive effect in developing the physical and psychological variables subject to study. The researchers recommend using exercise programs to develop different physical and psychological abilities for disabled children.