We visited the Jacksonville Zoo with our four children (ages 6-13) and had a very nice time. The zoo is small enough to enjoy in a partial day which we prefer as we'd rather not leave exhausted. We also took advantage of our reciprocal membership (from our home zoo) and received discounted admission.
A hydrocele is a collection of fluid surrounding the testicle. It is located within the outer layer of the testicle called the tunica vaginalis. Hydroceles can also develop due to inflammation or injury within the scrotum. These sometimes resolve over a few months but many remain and require medical attention.
1 Varicocele is dilatation of veins which carry blood from the testes. It appears as a bag of worms just above the testes. It may result in discomfort, mild pain or a sensation of heaviness in the affected side of testis.  Hydrocele is accumulation of fluid around the testes between two layers called tunica vaginalis.