Tarceva/Rapamycin for Children With Low-grade Gliomas With or Without Neurofibromatosis Type 1 (NF1)

Inclusion Criteria: * children less than 21 years of age, with or without neurofibromatosis, with recurrent low-grade gliomas. * patients with or without NF1 must have failed some form of conventional therapy, radiotherapy, or chemotherapy (carboplatin/vincristine) to be eligible, including those treated wtih initial surgery. Patients do not have to have received radiotherapy to be eligible. * children with all types of histologically proven low-grade gliomas will be eligible; re-operation at the time of recurrence is not mandatory for entry on study. * patients with intrinsic brain lesions, believed neuroradiographically consistent with a low-grade glial tumor, with neurofibromatosis type 1 can be treated without histological confirmation. * patients without neurofibromatosis type 1 must have histological confirmation of a low-grade glial tumor prior to entry on study. * patients must have a Karnofsky score of greater than or equal to 50% for children greater than 10 years of age, or a Lansky score of greater than or equal to 50% for patients less than 10 years of age. * patients who are unable to walk because of paralysis, but who are able to use a wheelchair, will be considered ambulatory for purposes of assessing performance score. * patients must have a life expectancy of at least 12 weeks. * patients must be able to swallow medication in tablet form. * patients must have adequate organ function, including: peripheral ANC of greater than 1,000/microliters; a platelet count of greater than 100,000/microliters; hemoglobin of greater than 8 gms,dl (pRBC transfusions of allowed to maintain hemoglobin \> 8 g/dl) * patients must have adequate renal function, which is defined as a normal serum creatinine for age * patients must have adequate liver function, as defined as a total bilirubin or less than 1.5 times the upper limit of normal for age, and an SGPT (ALT) of less than 2.5 times the upper limit of normal for age * patients must have had a MR scan within 3 weeks of starting treatment * all patients, and/or their parents or legal guardian, must sign a recent informed consent * all institutional, FDA, and NCI requirements for human study must be met. Exclusion Criteria: * patients must not have any other active tumors. * pregnancy or breast feeding is an exclusion criteria, as the potential mutagenicity and cytotoxicity of these drugs in developing fetuses are unknown. A pregnancy test must be obtained in females who are postmenarchal. Males or females of reproductive potential may not participate unless they have agreed to use an effective contraceptive method. * patients with uncontrolled infection are excluded. * patients who have previously received Tarceva or Rapamycin are excluded. * patients on antiepileptics and/or corticosteroids are allowed on study as long as they have been on a stable or weaning dose for 7 days prior to study initiation (defined as first day of treatment).